Friday, Saturday. Children age 9 and younger get in free after 3 p.m. Friday, Saturday. Adults get in after 3 p.m. on Friday for $15. Age 9 and younger get free ice cream if they come dressed up. No masks. Festival includes trick-or-treating, animal feedings, entertainment and more. 6000 Cypress Gardens Blvd. www.cypressgardens.com, 324-2111.

Three scare zones. Special effects and other features may be too much for children. WHEN: 8 p.m. to midnight Friday, Saturday. TICKETS: Donations, benefit for the SPCA. LOCATION: 1627 Saint Anthony St.

Imperial Symphony Orchestra will perform a free concert at 8 p.m. at Lake Mirror Amphitheatre. From 3 to 8 p.m., there will be an opportunity to donate blood. The orchestra will receive a $10 donation for each blood donor.